Sheet-delivering mechanism of printing machines



A. V. BUGLER ET AL SHEET DELIVERY MECHANISM OF PRINTING MACHINES 2 Sheets-Sheet 1 Filed Jan. 4 1924 as I l Sept. 14 1926. 1,600,036

A. v. BUGLER ET AL SHEET DELIVERY MECHANISM OF PRINTING MACHINES Filed Jan. 4 1 24 2 Sheets-Sheet 2 Patented Sept. 14, 192 6.

UNITED STATES PATENT "ori ice.

ARTHUR VICTOR BUGLER AND THOMAS EDWARD DELAFONS, OF LONDON, ENGLAND, ASSIGNORS TO LINO'IYPE AND MACHINERY LIMITED, OF LONDON, ENGLAND, A

LIMITED LIABILITY COMPANY OF GREAT BRITAIN.

SHEET-DELIVERING MECHANISM OFPRINIING MACHINES.

Application filed January 4, 1924, Serial No. 684,285, and in GreatBritain January 9, 1923.

This invention relates to sheet delivery mechanism of printing machines of the type in which the printed sheets are transferred by endless tapes from the printing couple on to the sticks or fingers of a reciprocating delivery carriage during the travel of the latter in an outward direction, and from which sticks the sheets are swept ofl by sheet pusher fingers temporarily interposed between the sticks during the travel of the carriage in an inward direction.

Ordinarily the sheet pusher fingers are adjustably secured on a rock shaft ,or socalled pusher finger rod located beneath the path of the delivery carriage, the said fingers beingcaused to assume their erect and prone positions during the respective inward and outward journeys of the delivery carriage. It is in connection with this same construction of mechanism that the present invention ishereinafter described, although it is to be understood that so far as concerns such invention itself, the just-named pusher finger rod may be located, as has heretofore been proposed, above the path of the delivery carriage instead of below it.

The sheet pusher fingers normally rest in their prone position on a rod usually known as the pusher bracket lock rod, and their erect or operative position is determined by a stop; a spring toggle arrangement as ordinarily, serves to retain the said pusher fingers in their two terminal positions until they are positively moved therefrom as hereinafter described.

In existing arrangements frequent breakages of the sheet pusher fingers have occurred and considerable noise been caused through the violence with which the said fingers are arrested in their terminal positions by the respective stops, and a principal object of the present invention is to provide a mechanism from which these difiiculties are almost, if not, entirely eliminated.

In the accompanying drawings Figure 1 is a side elevation of part of a printing machine fitted with a preferred constructional arrangement according to the present invention,

Figure 2 is a plan of same partly'broken away, and

Figure 3 is a fragmentary plan view of the delivery end of the, sheet conveying tapes, and its carrying roller and driving shaft.

The drawings show the invention applied to the known type of delivery in i which the printed sheets are conveyed from the printing machine by endless tapes 36 travelling about rollers 37 fast to a shaft 38, from which tapes the sheets are transferred to sticks or fingers 39 fast to a shaft is conveyed by those tapes over the sticks 39 until the leading edge of thatfsheetcontacts with sheet stop fingers 41 adjustably secured on the delivery carriage stop finger rod 14, which is pivotally mounted in the delivery carriage 15. The carriage is then i moved leftward and the sheet conveyed on the sticks 39 to the delivery position over the delivery board, whereupon the sheet stop fingers 41 are raised away from the leading edge of the sheet andsheet pusher fingers 20 are raised between the sticks 39 behind the following edge of the sheet, so that on the immediately succeeding rightward movement of the delivery carriage 15 the sheet is prevented from accompanying that carriage, with the result that it is swept off on to the delivery board. Only one of each of the organs 36 to 39 and 41 is represented in the drawing for the reason that their operation is well known and will i be sufliciently understood from the illustration given.

In the constructional arrangement illustrated, a bracket 1 is rigidly secured to the beforementioned pusher bracket lock rod 2 which, as ordinarily, is rigidly mounted in brackets 3, 3, adjustable along the usual two side bars 4, 4. On a stud 5' secured to the bracket 1, is pivoted a yoke or fork 6 to whose lower end, as by a screw 7, is pivotally attached one end of a link 8 whose opposite end is similarly attached, as by a stud 9 to a crank arm 10 fast to the beforementioned pusher finger rod 11. p

The fork 6 is adapted to be engaged by a roller 12 pivotally mounted on the lower end of an arm 13 which is rigidly secured to the sheet top finger rod 14. This rod, as ordinarily,'is free to rock in the' delivery carriage 15 (of which only a small portion is represented in the drawings) to an extent determined by a double stop arm 16 which engages with the top of one of the side members of that carriage when the rod 14 is in its two terminal angular positions.

The rod 1 1- is rocked about its axis, as ordinarily, by a curved arm or cam 17 fast to it, which, at or near the end of the outward journey of the delivery carriage 153' (that is to say towards the left as rcprc sented in the drawings) and through a roller 18 on .said arm, engages a tumbler cam 19 so as to cause the rod let to turn clockwise to bring the roller 12 into oper- .ative alignment with the fork 6 whose open end then faces towards said roller. When, therefore, during the return or inward travel of the delivery carriage 15 (that is to say, rightwards .of the drawings), the roller 12 engages the pivoted fork '6, it cants the latter over clockwise (as viewed in Figure 1) and through it, causes the sheet pusher fingers 20 to approach their prone position, this result being ,attainedthrough the link 8 and crank arm 10.

The before mentioned spring toggle arrangement comprises a rod 21 slidable longitudinally in a fixed lug 22, a second toggle member 23 fast to the pusher finger rod 11 and to which the rod 21 is pivotally connected as at 24. and a helical compression spring 25 encircling the rod 21 and a press ing against a shoulder on the latter with a constant tendency to move the pivot 24 leftward (as viewed in Figure 1) into its higher or lower position. The positions of the axes of the rod 11 and pivot 2 1 relatively to that of the perforation of the lug 22 are such that when the fork 6, by the engagement therewith of the roller 12, is moved from one to the other of its two terminal positions, said movement is first opposed and afterwards effected by the spring 25, but always subiect to the control exercised on the fork 6 by the roller 12, so that .the sheet pusher fingers 20 are brought into contact with the pusher bracket lock rod 2 without jar or noise.

During a laterpart of the inward (or rightward) journey of the delivery carriage, after the roller 12 has left the fork O, the cam arm 17 contacts with a succession of stationary rollers 26,- 27, which cause the sheet stop finger rod 14: to tilt say anticlockwise to such an extent as to bring the roller 18 thereon into position to afterwards en gage the tumbler cam 19 in the ordinary well-known manner.

The sheet stop finger rod 1 1 is provided with the usual frictional brake device (not shown in the drawing) which serves to prevent it from turning about its axis until positively moved through the engagement of the cam arm 17 on the roller 18 with either the stationary rollers 26, 27 or the tumbler 19 respectively, and to further ensiu'e that the roller 12 shall remain in the raised position into which it is moved by the passing of the cam arm 17 over the roller 26, and during the time that said cam arm travelling in either direction between the stationary rollers 26, 27, there is provided a rail 28 along which the said cam arm tracks during that part of its travel.

The pusher linger rod 11 is, as ordinarily, connected through a slotted link 29, with a bent lever arm 30 which, when rocked in one direction by one of the carriage-actuating members, serves in well-known n'ianner, tliroiiigh said link, to bring the sheet pusher lingers 20 to their erect position in which they are represented in Figure 1.

The before mentioned bent lever arm 30 is pivotally mounted as at 33, on one of the side bars 1-, and has rigidly attached thereto, a bent arm 34- which, during the leftward travel of the delivery carriage 15 is contat-ted by one of the members which "actuate the said carriage and thereby turned anticlockwise about the pivot 33. Just prior to this juncture the sheet pusher fingers 20- were in. their prone position so that the slotted link was correspondingly in its leftmost position, whereby, as a consequence of the justanentioned anti-clockwise turning of the arm 34, the pin 35, working within the solt 31, contacts with the righthand end of the latter and swings both the fingers 20 and the fork 6 over to the left, into the positions in which they are respectively shown in Figures 1 and 2. During this operation, the roller passes freely over the fork 6 until the latter, in its leftward swing, is brought into contact with said roller which, during its continued leftward travel (and atthe period at which the spring 25 is tending to depress the fork 6) is gradually withdrawn from the fork so that the latter and the fingers 2O reachtheir respective terminal posit-ions without jar or shock.

rho slot 31 of the link 29 admits of the lingers 20 being swung into their prone position by the roller 12 and fork 6, as aefore described, without affecting the bent arm 34-. so that this arm remains in position to be subsequently actuated for effecting the raising of the said lingers into their erect position.

When the fork 6, during the inward travel of the delivery carriage 15, is swung in clockwise direction (as viewed in the drawings), its movements in that direction is arrested by a stop 32 secur d to the bracket 1, said fork continuing to rest on the stop until, through the next actuation of the bent arm 34-, it is swung anti-clockwise.

Having described our invention, we declare that what we claim and desire to secure by Letters Patent is 1. In sheet delivery mechanism for print ing machines, the combination with a reciprocating delivery carriage, sheet pusher fingers adapted to be swung about a stationary axis and a spring device adapted to bring said fingers to their terminal positions, of means actuated by the delivery carriage adapted to control the operation of the sheet pusher lingers in opposition to the action of the spring device when that action is exerted to bring the fingers to their terminal positions.

2. In sheet delivery mechanism torprinting machines, the combination with a reciprocating delivery carriage, sheet pusher tingers adapted to be swung about a stationary axis from prone to erect position and vice versa, and a spring device adapted to bring said fingers to their terminal positions, of a yoke or fork in linked connection with said fingers, also capable of turning about a stationary axis, and a roller carried by the delivery carriage adapted to engage with the fork during the time that the sheet pusher fingers are moving under the iniluence of the spring device.

3. In sheet delivery mechanism for printing machines, the combination of a reciprocating delivery carriage, sheet pusher fingers adapted to be swung about a stationary axis, a spring toggle device adapted to first oppose and afterwards eilect the swinging of the sheet pusher fingers, and means actuated by the delivery carriage for opposing the actuation of the sheet pusher lingers during the time they are moved by the toggle device.

4. In sheet delivery mechanism for printing machines, the combination according to claim 2, characterized by a rail adapted to control the position of the fork-engaging roller.

In testimony whereof we have a-llixed our signatures hereto. I

ARTHUR VICTOR BUGLER. THOMAS EDWARD DELAFONS. 

